How Does Wind Power Work?

Wind is a form of solar energy. Winds are caused by the uneven heating of the atmosphere by the sun. Follow the link
for a detailed explanation to the question - What is wind?

The terms wind energy or wind power describe the process by which the wind is used to generate mechanical power or
electricity. Wind turbines convert the kinetic energy in the wind into mechanical power.

This mechanical power can
be used for specific tasks (such as grinding grain or pumping water) or a generator can convert this mechanical
power into electricity.

Wind power is an environmentally inert, clean, and inexhaustible source of electrical power.

So how do wind turbines make electricity? Simply stated, a wind turbine works the opposite of a fan. Instead of
using electricity to make wind, like a fan, wind turbines use wind to make electricity.

The wind turns the blades,
which spin a shaft, which connects to a generator and makes electricity. Take a
look inside a wind turbine
to see the various parts.

Instruments measure the wind speed and direction of wind turbines. When the wind changes direction motors turn the nacelle and blades
around to face the wind.

The nacelle (the box at the top of the turbine) is also fitted with brakes, so that the turbine can be switched off in very high winds, such as during
storms. This stops the turbine from being damaged.

All information is recorded by computers and transmitted to a control center. This way people only have to visit
the turbine occasionally for a mechanical check.

The real situation is of course more complicated, with many types of wind turbines, different types of generators and
safety systems - but this is a good guide to the basics.